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Study of Solvent-Solvent and Solute-Solvent Interactions and Measurement of Solvatochromic Parameters in Mixture of Molecular Solvents with Solvents

Kohantorabi, Mona | 2014

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  1. Type of Document: M.Sc. Thesis
  2. Language: Farsi
  3. Document No: 46383 (03)
  4. University: Sharif University of Technology
  5. Department: Chemistry
  6. Advisor(s): Gholami, Mohammad; Rahman Setayesh, Shahrbano; Salari, Hadi
  7. Abstract:
  8. Solvent-solvent and solute-solvent interactions were investigated in mixtures of Triton X-100 with water, methanol, ethanol, 1-propanol, tetrahydrofuran and butyl acetate. Solvatochromic parameters, including normalized polarity (E_T^N), dipolarity-polarizability (), hydrogen-bond donar (), and hydrogen-bond acceptor () abilities, were determined in these mixtures. We observed similar behavior for E_T^N and  in TX-100/alcohols mixtures. Parameters confirmed the preferential solvation in mixtures of surfactant and solvents.
    Experimental data were handled in preferential solvation model. Six binary systems exhibit a complex behavior for all three indicators. It was shown that 4-Nitroanisol solvated by the mixed solvents in TX-100/alcohols systems. This reagent solvated preferentially by water and mixed solvent in TX/water systems. The preferential parameters of 4-Nitroaniline showed that the indicator solvated preferentially by methanol in TX-100/Methanol mixtures. For all systems, these parameters demonstrate that the indicator solvated by the mixed solvents. An analysis of the preferential solvation parameters of betaine dye indicated that this probe is preferentially solvated by the mixed solvents. Betaine dye showed strongly positive solvatochromism in TX-100/alcohols mixtures. The sharp increasing of E_T^N in these mixtures and decreasing of this parameter in TX-100/THF and TX-100/Butyl acetate systems explained by these preferential solvation effects
  9. Keywords:
  10. Solvent-Solvent Interaction ; Solute-Solvent Interaction ; Solvatochromic Properties ; Surfactants ; Perferential Solvation

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